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Polymer Composites: Microstructural, Thermal and Mechanical Properties (Fourth Edition)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Polymeric Materials".

Deadline for manuscript submissions: 20 August 2026 | Viewed by 781

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Guest Editor
Institute for Polymers, Composites and Biomaterials, National Research Council, Via Campi Flegrei 34, 80078 Pozzuoli, NA, Italy
Interests: polymer-based composites; nanocomposites; polymer processing; mechanical properties; rheological behavior
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Special Issue Information

Dear Colleagues,

In recent decades, the increasing demand for high-performing materials and structures has stoked interest in the development and use of polymer composites in a wide range of industrial fields. These materials, combining at least two different phases, have the uniqueness needed to meet diverse design requirements with significant weight savings as well as a high strength-to-weight ratio. However, despite these strengths, some features, such as the difficult prediction of durability under structural loads, still severely limit their use.

This consideration is even more true for eco-friendly composites more recently developed in light of environmental concerns aimed at preserving fossil resources in favor of renewable ones. Their increased attraction is witnessed by numerous papers dealing with composites from biomatrices and/or reinforced with natural fibers in place of synthetic ones, but this trend is not yet reflected in a relevant range of industrial applications because of many challenges such as moisture, weathering, and biological attacks.

A further extension of the composites market cannot ignore a careful estimate of microstructural details, as well as a preliminary analysis of the final performances, especially in terms of thermal and mechanical properties.

This Special Issue aims to collate recent advancements made in the field of polymer composites through both original research papers and reviews.

Dr. Pietro Russo
Guest Editor

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Keywords

  • polymer composites
  • microstructure
  • thermal properties
  • mechanical properties
  • microscopy
  • fiber-reinforced polymers (FRPs)
  • reinforcement
  • interface microstructure

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Published Papers (1 paper)

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Research

25 pages, 4029 KB  
Article
Polylactide Composites with Mineral Fertilisers—Properties and Biodegradation
by Grzegorz Świderski, Marek Jałbrzykowski, Monika Kalinowska, Małgorzata Pawłowska, Grzegorz Markiewicz, Emilia Bujnowska, Agnieszka Z. Wilczewska and Jolanta Magnuszewska
Materials 2026, 19(3), 547; https://doi.org/10.3390/ma19030547 - 29 Jan 2026
Viewed by 620
Abstract
Polylactide (PLA) composites were prepared and doped with starch (10% by weight), and mineral salts used as mineral fertilisers (MgSO4, KNO3, Ca(NO3)2 and Ca3(PO4)2) were prepared. The content of the [...] Read more.
Polylactide (PLA) composites were prepared and doped with starch (10% by weight), and mineral salts used as mineral fertilisers (MgSO4, KNO3, Ca(NO3)2 and Ca3(PO4)2) were prepared. The content of the added fertilisers was 2% by mass in the composites. The tensile strength properties of the obtained composites were tested. The effect of the addition of fertilisers on the structure of polylactide was analysed using spectroscopic methods (FTIR and FTRaman). The thermal properties of the obtained composites were tested using thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC). PLA composites with fertilisers were tested for biodegradability in two types of soil—field soil and horticultural soil—and in compost. Biodegradability was assessed based on the mass loss of biodegraded composites, spectroscopic tests and visual assessment of changes occurring in the composites. Tests were performed on the respiratory activity of microorganisms in the compost extract in which the tested composites were placed. The addition of mineral salts used in the tested composites significantly influenced the biodegradation rate of the composites. Mineral compounds (MgSO4, KNO3 and Ca(NO3)2) added to the PLA–starch composite improve its mechanical properties. It should also be noted that the addition of mineral salts to the prepared composites did not affect the chemical structure of polylactide. The addition of mineral salts to PLA also did not significantly affect its thermal properties, as demonstrated by DSC and TG thermal analysis. Full article
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